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HVAC Builder

Design custom HVAC systems in 3D or as a 2D schematic from real parts, solve the real thermodynamics, and simulate a full year of weather — from a DX split to a chilled-water plant.

Verified ownerFreemium · from $15Launched 15 September 2026
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HVAC Builder interface
What it does

About HVAC Builder

HVAC Builder is a browser-based tool for designing, solving and simulating custom HVAC systems. Assemble a machine from real components — coils, compressors, fans, pumps, cooling towers, heat-recovery cores — in a 3D scene or as a 2D schematic, connect the air, water and refrigerant ports, and solve the thermodynamic balance at a design point or across a full year of weather. Scale up to a whole building, room by room, with load-following control, economisers, VRF and chilled-water plants. The catalog carries more than 9,700 published compressor maps and the physics is validated against vendor data. Free tier, no card needed; spec reports, annual energy and supplier quotes on paid plans.
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